@article{DAN_1991_319_1_a5,
     author = {A. Dzhuraev},
     title = {Formulation of three-dimensional elliptic boundary value problems},
     journal = {Doklady Akademii Nauk},
     pages = {33--37},
     publisher = {mathdoc},
     volume = {319},
     number = {1},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1991_319_1_a5/}
}